package com.sttx.bookmanager.util.map;

import javax.servlet.http.HttpServletRequest;

public class IPUtils {  
    public static String getIpAddr(HttpServletRequest request) {  
           String ip = request.getHeader("X-Forwarded-For");  
           if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
               ip = request.getHeader("Proxy-Client-IP");  
           }  
           if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
               ip = request.getHeader("WL-Proxy-Client-IP");  
           }  
           if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
               ip = request.getHeader("HTTP_CLIENT_IP");  
           }  
           if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
               ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
           }  
           if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
               ip = request.getRemoteAddr();  
           }  
           return ip;  
       }  
}